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US4390774A - Method and apparatus for treating electrically non-conductive workpieces - Google Patents

Method and apparatus for treating electrically non-conductive workpieces Download PDF

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Publication number
US4390774A
US4390774A US06/247,112 US24711281A US4390774A US 4390774 A US4390774 A US 4390774A US 24711281 A US24711281 A US 24711281A US 4390774 A US4390774 A US 4390774A
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US
United States
Prior art keywords
workpiece
arc
electrodes
electrode
laser beam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/247,112
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English (en)
Inventor
William M. Steen
Walter W. Duley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Research Development Corp UK
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National Research Development Corp UK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by National Research Development Corp UK filed Critical National Research Development Corp UK
Assigned to NATIONAL RESEARCH DEVELOPMENT CORPORATION, A BRITISH CORP. reassignment NATIONAL RESEARCH DEVELOPMENT CORPORATION, A BRITISH CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: STEEN, WILLIAM M.
Application granted granted Critical
Publication of US4390774A publication Critical patent/US4390774A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/1462—Nozzles; Features related to nozzles
    • B23K26/1464—Supply to, or discharge from, nozzles of media, e.g. gas, powder, wire
    • B23K26/147—Features outside the nozzle for feeding the fluid stream towards the workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08—Devices involving relative movement between laser beam and workpiece
    • B23K26/083—Devices involving movement of the workpiece in at least one axial direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
    • B23K26/348—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding in combination with arc heating, e.g. TIG [tungsten inert gas], MIG [metal inert gas] or plasma welding

Definitions

  • the present invention relates to methods and apparatus for treating non-electrically conducting workpieces using a laser.
  • treating in this specification includes cutting, welding, drilling, surface hardening, surface alloying and thermally treating, and the word "workpiece", particularly in welding, includes the plural.
  • a method for treating a workpiece comprising projecting a beam of light from a laser onto a workpiece formed from non-conductive material, and applying a voltage between at least two electrodes to strike an arc, the electrodes being so positioned that the arc impinges on the workpiece within a heat affected zone created by the laser beam in the workpiece.
  • non-conductive material includes all materials which are not generally classed as conductors and thus, for example, the term includes semiconductors in addition to insulators.
  • the heat affected zone is that zone of the workpiece which is raised to a comparatively high temperature by energy from the laser.
  • the workpiece may be interposed between the, or at least two of, the electrodes.
  • the arc extends through the workpiece; for example during cutting the arc may extend through the cut and during welding the arc may extend through the gap between the unwelded portions of the workpiece adjacent to the point where welding is taking place. If the workpiece is thin and/or porous, for example paper or cloth, the arc may extend through small holes in the workpiece.
  • first and second arcs may extend from a first electrode to the workpiece and from the workpiece to a second electrode, respectively, or a single arc may extend from one electrode to the workpiece.
  • the single arc may be on the same side of the workpiece as the laser beam or when the heat affected zone extends through the workpiece to an opposite surface thereof, the single arc may extend from the said opposite surface to one of the electrodes.
  • the main advantage of the present invention is that the arc travels preferentially down a plasma induced by the laser to the heat affected zone and the workpiece burns in a controlled way or increases in electrical conductivity with temperature as in the cutting of glass or paper.
  • heat, useful in the heat treating process is transferred from the arc to the workpiece and hence the heat provided by the laser beam is augmented.
  • the methods and apparatus of the above mentioned specifications are therefore modified in a way which allows a non-conductive workpiece to be treated even though the material of the workpiece cannot, due to its inability to conduct well, be effectively connected in the circuit applying the arc. For example the workpiece could not be effectively connected to earth.
  • Another advantage is that the additional power supplied to the non-conductive workpiece is expected, for welding, to result in a weld with a narrow heat affected zone and a large depth to width ratio indicating high penetration.
  • a jet of gas from a nozzle is also projected at the said heat affected zone; the gas may be inert or may react with either the workpiece, the electrode (for welding) or a flux.
  • the invention may be used, for example, in cutting glass and paper, and cloth, card, leather, plastics, ceramics and semiconductors may also be cut.
  • Other applications include welding glass and plastic, vulcanizing rubber and thermally setting resins.
  • the method of the invention may include so causing relative movement between the said zone and the workpiece, while maintaining the arc or arcs between one of the electrodes and the workpiece, that the treatment is carried out as required.
  • the method according to the invention may include applying material, to be alloyed with a portion of the surface of the workpiece, to the said portion and at the same time, or after, so causing relative movement between the said zone and the workpiece that the said zone visits every point in the area to be surface alloyed.
  • a multi-phase supply may be used to cause arcing and if so more than two electrodes may be used.
  • three electrodes connected to line voltages may be positioned on one side of the workpiece with another electrode connected to neutral positioned on the other side.
  • apparatus for treating a workpiece comprising means for projecting a laser beam on to a workpiece, at least first and second electrodes spaced apart from one another, and means for applying a voltage between the electrodes to strike an arc which, in operation, impinges on the workpiece at a point within a heat affected zone created by the laser beam in the workpiece.
  • the arc extends through the workpiece from one electrode to the other electrode, the arc either passing through a cut or gap in the workpiece or penetrating the workpiece material.
  • Apparatus according to the invention my include means for causing relative movement between the said zone and the workpiece while maintaining the arc between one of the electrodes and the said zone.
  • the apparatus may include means for projecting either a jet of gas from a nozzle towards the heat affected zone from a position opposite one workpiece surface which receives the laser beam or from a position opposite another workpiece surface, or projecting jets of gas from first and second nozzles towards the heat affected zone from positions opposite the said one and the said other workpiece surfaces respectively.
  • the gas may be exothermically reactive with the expected workpiece and/or flux expected to be applied to the workpiece.
  • the apparatus may include means for deflecting away from the laser beam at least part of the plume of gaseous materials and/or particles which is emitted from the point of incidence of the laser beam on the workpiece.
  • one of the electrodes may be positioned nearest the workpiece at a point in the workpiece where treatment is just about to take place.
  • FIG. 1 shows a first apparatus according to the invention and illustrates the method of the invention
  • FIG. 2 shows a second apparatus according to the invention which also illustrates the method.
  • FIG. 1 An arrangement for welding or cutting using an inert gas, or a reactive gas, such as oxygen or chlorine, which takes part in an exothermic reaction is shown in FIG. 1.
  • a laser beam 10 is focussed at a point 16 on a workpiece 15 by means of a lens 22.
  • the workpiece 15 is made of non-electrically conducting material and since the figure is intended to show a general arrangement, the workpiece is not shown, for example as being partially cut or as made up of two portions being welded, rather its position and general form only are shown.
  • the inert gas used for welding or the reactive gas used for cutting passes through an inlet 23 into a housing 24 having a nozzle 25 which is, in operation, just above the point 14.
  • a voltage is applied between the electrodes 17 and 26 to strike an arc between these electrodes through a cut or gap in the workpiece. For example if the workpiece is being cut the arc passes through the cut adjacent to the point at which cutting is taking place. Similarly if the workipece is being welded the arc passes through the gap between the unwelded portions of the workpiece adjacent to the point at which welding is taking place. In this way heat is transferred from the arc to the workpiece to assist cutting, for example by means of charring, or welding. There are thus two or three sources of heat for use in heat treatment; the laser beam, the reaction between the reactive gas (when used) and the workpiece, and the arc struck between the electrodes.
  • the arc may penetrate the workpiece without forming a cut, for example if a paper or cloth workpiece is being treated the arc may penetrate minute perforations in the workpiece without cutting the workpiece in two.
  • the arc may also extend from the electrode 26 to the workpiece and then a separate arc may exist from the workpiece to the electrode 17 and it is also possible that only one of these arcs may be present during treatment, depending on the relative distances between electrode 17 and the workpiece and between the electrode 26 and the workpiece.
  • FIG. 2 the same components are used as in FIG. 1 but an additional electrode 30 which is shielded by inert gas in the same way as the electrode 26 is provided.
  • This electrode can be used with the electrode 26 and a further electrode (not shown) for working from a three phase supply.
  • the electrodes 26 and 30 are connected to respective line terminals of the supply by way of conductors 31 and 32 and the further electrode is connected to the other line terminal.
  • a connection 33 connects the electrode 17 to the neutral of the three phase supply.
  • a further nozzle 34 with an inlet 35 for reactive or inert gas projects gas towards the heat affected zone on the opposite side of the workpiece 15 from the laser beam 10.
  • a schematic indication of means for moving the workpiece relative to the laser beam is shown in the form of a clamp 36, a lead screw 37 and an electric motor 38.
  • the workpiece may for example move in the direction of the arrow 39 while being cut or welded so that the electrode 26 is nearest to the workpiece where treatment is about to take place. The arc from this electrode therefore prepares the next part of the workpiece to be treated.
  • a further gas nozzle or one of the nozzles shown, may be used to blow the plume of gaseous materials and/or particles which forms above the point at which treatment occurs.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)
  • Arc Welding In General (AREA)
US06/247,112 1980-03-25 1981-03-24 Method and apparatus for treating electrically non-conductive workpieces Expired - Fee Related US4390774A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8009981 1980-03-25
GB8009981 1980-03-25

Publications (1)

Publication Number Publication Date
US4390774A true US4390774A (en) 1983-06-28

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US06/247,112 Expired - Fee Related US4390774A (en) 1980-03-25 1981-03-24 Method and apparatus for treating electrically non-conductive workpieces

Country Status (3)

Country Link
US (1) US4390774A (de)
JP (1) JPS56151190A (de)
DE (1) DE3111402A1 (de)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4497692A (en) * 1983-06-13 1985-02-05 International Business Machines Corporation Laser-enhanced jet-plating and jet-etching: high-speed maskless patterning method
US4684780A (en) * 1984-10-19 1987-08-04 R T M Istituto Per Le Ricerche Di Tecnologia Meccanica E Per L'automazione Laser beam focusing head
US4689467A (en) * 1982-12-17 1987-08-25 Inoue-Japax Research Incorporated Laser machining apparatus
US5227604A (en) * 1991-06-28 1993-07-13 Digital Equipment Corporation Atmospheric pressure gaseous-flux-assisted laser reflow soldering
US5700989A (en) * 1994-12-30 1997-12-23 Dykhno; Igor S. Combined laser and plasma arc welding torch
US5705785A (en) * 1994-12-30 1998-01-06 Plasma-Laser Technologies Ltd Combined laser and plasma arc welding torch
US5821493A (en) * 1994-09-23 1998-10-13 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Hybrid laser and arc process for welding workpieces
US6297469B1 (en) * 1998-06-19 2001-10-02 Jurgen Schulz-Harder Process for producing a metal-ceramic substrate
US20020038925A1 (en) * 2000-04-14 2002-04-04 Karl Reimer Apparatus and method for continuous surface modification of substrates
US6469277B1 (en) * 1999-09-16 2002-10-22 Linde Gas Aktiengesellschaft Method and apparatus for hybrid welding under shielding gas
US20030136768A1 (en) * 2001-12-27 2003-07-24 Hirofumi Sonoda Method and apparatus for composite YAG laser/arc welding
US20030173343A1 (en) * 2000-08-21 2003-09-18 Olivier Matile Method and installation for hybrid laser/arc welding using a power-diode laser
US6888098B1 (en) * 2002-07-03 2005-05-03 Scimed Life Systems, Inc. Tubular cutting process and system
FR2936177A1 (fr) * 2008-09-24 2010-03-26 Air Liquide Procede de soudage laser de type co2 avec buse a jet dynamique.
US20110132878A1 (en) * 2008-08-19 2011-06-09 Panasonic Corporation Hybrid welding method and hybrid welding apparatus
US20110198317A1 (en) * 2010-02-18 2011-08-18 The Esab Group, Inc. Hybrid welding with multiple heat sources
WO2012000686A1 (de) 2010-07-02 2012-01-05 Schott Ag Verfahren und vorrichtungen zur erzeugen einer vielzahl von löchern in werkstücken
DE102010025968A1 (de) 2010-07-02 2012-01-05 Schott Ag Erzeugung von Mikrolöchern
DE102010025969A1 (de) 2010-07-02 2012-01-05 Schott Ag Locherzeugung mit Mehrfach-Elektroden
US20130136940A1 (en) * 2011-11-28 2013-05-30 General Electric Company Welding system, welding process, and welded article
CN103252557A (zh) * 2013-05-30 2013-08-21 上海交通大学 一种实现中厚板打底焊不清根的焊接方法
US20130309000A1 (en) * 2012-05-21 2013-11-21 General Electric Comapny Hybrid laser arc welding process and apparatus
EP2868633A1 (de) * 2013-10-31 2015-05-06 Linde Aktiengesellschaft Verfahren zum Fügen oder Trennen von elektrisch nicht leitenden Werkstücken
US20210031297A1 (en) * 2019-08-01 2021-02-04 GM Global Technology Operations LLC System and method for multi-task laser welding
US11744015B2 (en) 2010-07-02 2023-08-29 Schott Ag Interposer and method for producing holes in an interposer
US12036624B2 (en) * 2017-03-03 2024-07-16 Furukawa Electric Co., Ltd. Welding method and welding apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60106688A (ja) * 1983-11-16 1985-06-12 Hitachi Ltd レ−ザ加工装置

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US3569660A (en) * 1968-07-29 1971-03-09 Nat Res Dev Laser cutting apparatus
GB1547172A (en) 1976-06-24 1979-06-06 Nat Res Dev Methods and apparatus for cutting welding drilling and surface treating
US4167662A (en) * 1978-03-27 1979-09-11 National Research Development Corporation Methods and apparatus for cutting and welding
GB2045669A (en) 1979-03-05 1980-11-05 Fiat Auto Spa Method of microdrilling metal workpiece using a power laser
GB1600796A (en) 1978-02-15 1981-10-21 Nat Res Dev Methods and apparatus for cutting welding and surface treating
US4322601A (en) * 1978-08-14 1982-03-30 Serlin Richard A Surface alloying method and apparatus using high energy beam

Patent Citations (6)

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US3569660A (en) * 1968-07-29 1971-03-09 Nat Res Dev Laser cutting apparatus
GB1547172A (en) 1976-06-24 1979-06-06 Nat Res Dev Methods and apparatus for cutting welding drilling and surface treating
GB1600796A (en) 1978-02-15 1981-10-21 Nat Res Dev Methods and apparatus for cutting welding and surface treating
US4167662A (en) * 1978-03-27 1979-09-11 National Research Development Corporation Methods and apparatus for cutting and welding
US4322601A (en) * 1978-08-14 1982-03-30 Serlin Richard A Surface alloying method and apparatus using high energy beam
GB2045669A (en) 1979-03-05 1980-11-05 Fiat Auto Spa Method of microdrilling metal workpiece using a power laser

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Title
Steen and Eboo "Arc Augmented Laser Welding" Metal Construction, Jul. 1979, pp. 332, 333 and 335. *

Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4689467A (en) * 1982-12-17 1987-08-25 Inoue-Japax Research Incorporated Laser machining apparatus
US4497692A (en) * 1983-06-13 1985-02-05 International Business Machines Corporation Laser-enhanced jet-plating and jet-etching: high-speed maskless patterning method
US4684780A (en) * 1984-10-19 1987-08-04 R T M Istituto Per Le Ricerche Di Tecnologia Meccanica E Per L'automazione Laser beam focusing head
US5227604A (en) * 1991-06-28 1993-07-13 Digital Equipment Corporation Atmospheric pressure gaseous-flux-assisted laser reflow soldering
US5821493A (en) * 1994-09-23 1998-10-13 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Hybrid laser and arc process for welding workpieces
US5700989A (en) * 1994-12-30 1997-12-23 Dykhno; Igor S. Combined laser and plasma arc welding torch
US5705785A (en) * 1994-12-30 1998-01-06 Plasma-Laser Technologies Ltd Combined laser and plasma arc welding torch
US6297469B1 (en) * 1998-06-19 2001-10-02 Jurgen Schulz-Harder Process for producing a metal-ceramic substrate
EP1084789A3 (de) * 1999-09-16 2003-04-16 Linde AG Verfahren und Vorrichtung zum Schutzgas-Hybridschweissen
US6469277B1 (en) * 1999-09-16 2002-10-22 Linde Gas Aktiengesellschaft Method and apparatus for hybrid welding under shielding gas
US20020038925A1 (en) * 2000-04-14 2002-04-04 Karl Reimer Apparatus and method for continuous surface modification of substrates
US20030173343A1 (en) * 2000-08-21 2003-09-18 Olivier Matile Method and installation for hybrid laser/arc welding using a power-diode laser
US20030136768A1 (en) * 2001-12-27 2003-07-24 Hirofumi Sonoda Method and apparatus for composite YAG laser/arc welding
US20040232130A1 (en) * 2001-12-27 2004-11-25 Honda Giken Kogyo Kabushiki Kaisha Method and apparatus for composite YAG laser/arc welding
US7009139B2 (en) * 2001-12-27 2006-03-07 Honda Giken Kogyo Kabushiki Kaisha Method and apparatus for composite YAG laser/arc welding
US7019256B2 (en) * 2001-12-27 2006-03-28 Honda Giken Kogyo Kabushiki Kaisha Method and apparatus for composite YAG laser/arc welding
US6888098B1 (en) * 2002-07-03 2005-05-03 Scimed Life Systems, Inc. Tubular cutting process and system
US20050150100A1 (en) * 2002-07-03 2005-07-14 Merdan Kenneth M. Tubular cutting process and system
US20080275538A1 (en) * 2002-07-03 2008-11-06 Boston Scientific Scimed, Inc. Tubular cutting process and system
US9180032B2 (en) 2002-07-03 2015-11-10 Boston Scientific Scimed, Inc. Tubular cutting process and system
US20110132878A1 (en) * 2008-08-19 2011-06-09 Panasonic Corporation Hybrid welding method and hybrid welding apparatus
US8791384B2 (en) * 2008-08-19 2014-07-29 Panasonic Corporation Hybrid welding method and hybrid welding apparatus
FR2936177A1 (fr) * 2008-09-24 2010-03-26 Air Liquide Procede de soudage laser de type co2 avec buse a jet dynamique.
WO2010034916A1 (fr) * 2008-09-24 2010-04-01 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Procédé de soudage laser de type co2 avec buse à jet dynamique
US20110174786A1 (en) * 2008-09-24 2011-07-21 Philippe Lefebvre Method for CO2 Laser Welding with a Dynamic Jet Nozzle
US9321131B2 (en) * 2008-09-24 2016-04-26 L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Method for CO2 laser welding with a dynamic jet nozzle
CN102164704B (zh) * 2008-09-24 2014-07-30 乔治洛德方法研究和开发液化空气有限公司 利用动力学射流喷嘴的co2激光焊接方法
EP2420345A1 (de) * 2008-09-24 2012-02-22 L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Laserschweißverfahren vom Typ CO2 mit dynamischer Sprühstrahldüse
EP2537623A1 (de) * 2008-09-24 2012-12-26 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Verfahren zum Schweissen mittels CO2 Laser mit einer dynamischen Strahldüse.
US8729424B2 (en) 2010-02-18 2014-05-20 The Esab Group, Inc. Hybrid welding with multiple heat sources
US20110198317A1 (en) * 2010-02-18 2011-08-18 The Esab Group, Inc. Hybrid welding with multiple heat sources
WO2012000686A1 (de) 2010-07-02 2012-01-05 Schott Ag Verfahren und vorrichtungen zur erzeugen einer vielzahl von löchern in werkstücken
WO2012000684A1 (de) 2010-07-02 2012-01-05 Schott Ag Locherzeugung mit mehrfach-elektroden
US11744015B2 (en) 2010-07-02 2023-08-29 Schott Ag Interposer and method for producing holes in an interposer
DE102010025968B4 (de) * 2010-07-02 2016-06-02 Schott Ag Erzeugung von Mikrolöchern
US9018565B2 (en) 2010-07-02 2015-04-28 Schott Ag Generation of holes using multiple electrodes
WO2012000687A1 (de) 2010-07-02 2012-01-05 Schott Ag Erzeugung von mikrolöchern
DE102010025969A1 (de) 2010-07-02 2012-01-05 Schott Ag Locherzeugung mit Mehrfach-Elektroden
DE102010025968A1 (de) 2010-07-02 2012-01-05 Schott Ag Erzeugung von Mikrolöchern
CN102985240A (zh) * 2010-07-02 2013-03-20 肖特公开股份有限公司 微孔的产生
DE102010025967B4 (de) * 2010-07-02 2015-12-10 Schott Ag Verfahren zur Erzeugung einer Vielzahl von Löchern, Vorrichtung hierzu und Glas-Interposer
DE102010025967A1 (de) 2010-07-02 2012-01-05 Schott Ag Positionieren von Mikrolöchern
US20130136940A1 (en) * 2011-11-28 2013-05-30 General Electric Company Welding system, welding process, and welded article
US20130309000A1 (en) * 2012-05-21 2013-11-21 General Electric Comapny Hybrid laser arc welding process and apparatus
CN103252557B (zh) * 2013-05-30 2015-07-15 上海交通大学 一种实现中厚板打底焊不清根的焊接方法
CN103252557A (zh) * 2013-05-30 2013-08-21 上海交通大学 一种实现中厚板打底焊不清根的焊接方法
EP2868633A1 (de) * 2013-10-31 2015-05-06 Linde Aktiengesellschaft Verfahren zum Fügen oder Trennen von elektrisch nicht leitenden Werkstücken
US12036624B2 (en) * 2017-03-03 2024-07-16 Furukawa Electric Co., Ltd. Welding method and welding apparatus
US20210031297A1 (en) * 2019-08-01 2021-02-04 GM Global Technology Operations LLC System and method for multi-task laser welding

Also Published As

Publication number Publication date
DE3111402A1 (de) 1982-04-29
JPS56151190A (en) 1981-11-24

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Owner name: NATIONAL RESEARCH DEVELOPMENT CORPORATION, 101 NEW

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